/*
 * Copyright © 2012 The Feign Authors (feign@commonhaus.dev)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package feign.ribbon;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType;
import static org.junit.jupiter.api.Assertions.assertThrows;

import com.netflix.client.ClientException;
import java.io.IOException;
import java.net.ConnectException;
import org.junit.jupiter.api.Test;

class PropagateFirstIOExceptionTest {

  @Test
  void propagatesNestedIOE() throws IOException {
    assertThatExceptionOfType(IOException.class)
        .isThrownBy(
            () -> {
              RibbonClient.propagateFirstIOException(new ClientException(new IOException()));
            });
  }

  @Test
  void propagatesFirstNestedIOE() throws IOException {
    IOException exception =
        assertThrows(
            IOException.class,
            () ->
                RibbonClient.propagateFirstIOException(
                    new ClientException(new IOException(new IOException()))));
    assertThat(exception).hasCauseInstanceOf(IOException.class);
  }

  /**
   * Happened in practice; a blocking observable wrapped the connect exception in a runtime
   * exception
   */
  @Test
  void propagatesDoubleNestedIOE() throws IOException {
    assertThatExceptionOfType(ConnectException.class)
        .isThrownBy(
            () -> {
              RibbonClient.propagateFirstIOException(
                  new ClientException(new RuntimeException(new ConnectException())));
            });
  }

  @Test
  void doesntPropagateWhenNotIOE() throws IOException {
    RibbonClient.propagateFirstIOException(new ClientException(new RuntimeException()));
  }
}
